Mark Hanny

I was running into the same issue man. My work around was re-installing License Administrator. Easiest way to go about is down the Houdini Launcher [www.sidefx.com]. In the launcher you can uninstall and then reinstall the License Administrator



next thing would be why are you still running 10.14? I'm running a 2016 Macbook Pro on BigSur with no issues.

so you have to do the following:

Download and copy the InstantMesh.app to $HOUDINI_USER_PREF_DIR

From the menu bar open "Assets -> Asset Manager"
In the Asset Manger Window select the Configuration tab
At of the bottom of the window set the "Asset bar" to "Display Menu of All Definitions"

From the Network Graph select the Labs Instant Meshes Node
In the Labs Instant Meshes Node Parameters
Change the "Asset Name and Path" from "labs::instant_meshes::2.0 to "labs::instant_meshes"

In the Labs Instant Meshes Node Parameters select the "Settings" tab
Change the "Instant Meshes Location" to "$HOUDINI_USER_PREF_DIR/Instant Meshes.app/Contents/MacOS/Instant Meshes"
Change the "Remesh Tmp File" & "Unmeshed Tmp File" to "$HIP/input_geo.obj" & "$HIP/output_geo.obj"
Click the gear icon in Parameter pane and select "Save as Permanent Defaults"

Right click the Labs Instant Meshes Node in the Network Graph and select "Allow Editing of Contents"
Dive into Labs Instant Meshes Node and select the "python1" node
Edit line 10 from "numPolys = str(node.parm("poly_count").eval() / 4)" to "numPolys = str(int(node.parm("poly_count").eval() / 4))"
Dive back up, right click the Labs Instant Meshes Node and select "Version Digital Asset -> Save as..."
Save as a newer version